小直径薄壁直缝埋弧焊管焊接缺陷探讨
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摘要
分析小直径直缝埋弧焊管焊接时的受力状态,找出导致小直径薄壁直缝埋弧焊管产生烧穿、气孔、咬边的主要原因;分析"噘嘴"对小直径薄壁直缝埋弧焊管焊接质量的影响;给出防止焊缝产生上述缺陷的控制措施。分析认为:重力和热输入是导致小直径薄壁直缝埋弧焊管产生焊接缺陷的主要原因;通过控制热输入、成型后"噘嘴"、内焊缝宽度并适当调整坡口尺寸等,可减少小直径薄壁直缝埋弧焊管内焊焊接缺陷的产生。
The stress state in welding of small diameter LSAW pipes is analyzed and the key causes leading to burning through,air holes and undercutting occurred in welding of small diameter LSAW pipes are summed up. The control measures to prevent the above defects occurred in welding joint are provided through analysis of the effects of the"pout"on the weld quality of small diameter and thin walled LSAW pipes. The result shows that the gravity and heat input are the main reasons which cause the weld defects occurred in small diameter and thin walled LSAW pipes.The weld defects occurred in inner welding joint of small diameter and thin walled LSAW pipes can be reduced by controlling the heat input, the" pout" during formation and inner welding joint width as well as properly adjusting the bevel dimension.
The stress state in welding of small diameter LSAW pipes is analyzed and the key causes leading to burning through,air holes and undercutting occurred in welding of small diameter LSAW pipes are summed up. The control measures to prevent the above defects occurred in welding joint are provided through analysis of the effects of the"pout"on the weld quality of small diameter and thin walled LSAW pipes. The result shows that the gravity and heat input are the main reasons which cause the weld defects occurred in small diameter and thin walled LSAW pipes.The weld defects occurred in inner welding joint of small diameter and thin walled LSAW pipes can be reduced by controlling the heat input, the" pout" during formation and inner welding joint width as well as properly adjusting the bevel dimension.
引文
[1]柯星星,张世涛,户志国.交流双丝埋弧焊在薄壁直缝焊管内焊中的应用[J].现代焊接,2013(1):48-50.
[2]李延丰,邓璐,田廓.一种中小直径直缝埋弧焊管的制造方法[J].钢管,2013,42(4):37-39.
[3]汪超,郭锦龙,马立立.简析直缝埋弧焊管焊接接头常见缺陷[J].钢管,2013,42(2):51-54.
[4]王亚男.常见焊接接头缺陷分析[J].科技风,2011(6):144.
[5]API Spec 5L—2012管线钢管规范[S].2012.
[6]张文钺.焊接冶金学[M].北京:机械工业出版社,1995:143-150.
[7]姜焕中.电弧焊与电渣焊[M].北京:机械工业出版社,1995:79-84.
[8]GB/T 9711—2011石油天然气工业管线输送用钢管[S].北京:中国标准出版社,2012.
[9]王立柱.钝边角度对直缝埋弧焊管的影响[J].钢管,2016,45(3):58-61.
[10]任文辉,林智群,彭道林.液体表面张力系数与温度和浓度的关系[J].湖南农业大学学报(自然科学版),2004,30(1):77-79.
[11]王立柱,魏旭,张婷婷,等.直缝埋弧焊管焊缝CO气孔产生的原因[J].焊管,2015,38(2):64-67.
[12]王立柱,张婷婷,王亚彬,等.直缝埋弧焊管焊缝单侧咬边和焊偏缺陷原因分析[J].焊管,2015,38(8):66-68.
[13]王立柱,龚健,孟凡佳,等.直缝埋弧焊管产生咬边缺陷的原因分析[J].钢管,2016,45(5):38-40.
[2]李延丰,邓璐,田廓.一种中小直径直缝埋弧焊管的制造方法[J].钢管,2013,42(4):37-39.
[3]汪超,郭锦龙,马立立.简析直缝埋弧焊管焊接接头常见缺陷[J].钢管,2013,42(2):51-54.
[4]王亚男.常见焊接接头缺陷分析[J].科技风,2011(6):144.
[5]API Spec 5L—2012管线钢管规范[S].2012.
[6]张文钺.焊接冶金学[M].北京:机械工业出版社,1995:143-150.
[7]姜焕中.电弧焊与电渣焊[M].北京:机械工业出版社,1995:79-84.
[8]GB/T 9711—2011石油天然气工业管线输送用钢管[S].北京:中国标准出版社,2012.
[9]王立柱.钝边角度对直缝埋弧焊管的影响[J].钢管,2016,45(3):58-61.
[10]任文辉,林智群,彭道林.液体表面张力系数与温度和浓度的关系[J].湖南农业大学学报(自然科学版),2004,30(1):77-79.
[11]王立柱,魏旭,张婷婷,等.直缝埋弧焊管焊缝CO气孔产生的原因[J].焊管,2015,38(2):64-67.
[12]王立柱,张婷婷,王亚彬,等.直缝埋弧焊管焊缝单侧咬边和焊偏缺陷原因分析[J].焊管,2015,38(8):66-68.
[13]王立柱,龚健,孟凡佳,等.直缝埋弧焊管产生咬边缺陷的原因分析[J].钢管,2016,45(5):38-40.